摘要
碳点(CDs)作为一类新型零维碳基纳米材料,因其可调发光性、低毒性和多功能性,在生物成像、光电器件及环境传感等领域展现出广阔应用前景.由于制备方法不同、原料来源多样以及组成结构复杂,碳点的发光机制一直是研究重点.不明确的发光机制制约了高荧光性能碳点的设计与应用.本文系统梳理了碳点的结构与发光机制之间的构效关系,重点解析了量子限域效应、有效共轭长度、表面-边缘态、分子态及交联增强发射效应等5种核心机制的作用,以期为高荧光性能碳点的可控合成与功能化应用提供理论指导.
As a novel class of zero-dimensional carbon-based nanomaterials,carbon dots(CDs)have demonstrated broad application prospects in bioimaging,optoelectronic devices,and environmental sensing due to their tunable luminescence,low toxicity,and versatile functionality.However,the luminescence mechanisms of CDs remain a central research focus owing to diverse synthesis methods,varied raw material sources,and complex compositionstructure characteristics.The elusive nature luminescence mechanism has hindered the rational design and applica⁃tion of CDs with superior fluorescence performance.This article systematically investigates the correlation between the structural characteristics and luminescence mechanisms of CDs,with focused analysis on the roles of five core mechanisms:quantum confinement effect,effective conjugate length,surface-edge states,molecular states,and cross-link enhanced emission effects.The comprehensive analysis aims to provide theoretical guidance for the controlled synthesis and functional applications of CDs with superior fluorescence performance.
作者
刘翼泽
李鹏飞
孙再成
LIU Yize;LI Pengfei;SUN Zaicheng(College of Environmental Science and Engineering,Beijing University of Technology,Beijing 100124,China;College of Chemistry and Life Science,Beijing University of Technology,Beijing 100124,China)
出处
《高等学校化学学报》
北大核心
2025年第6期41-54,共14页
Chemical Journal of Chinese Universities
基金
国家重点研发计划项目(批准号:2023YFB3810800)
国家自然科学基金(批准号:22272003和22301013)资助.
关键词
碳点
发光机制
碳基纳米材料
结构组成
Carbon dots
Luminescence mechanisms
Carbon-based nanomaterial
Structural composition
